Cauliflower Gratin - Master recipes

Ingredients

• 1 head cauliflower, cored, broken into bite-sized florets (see How to Cut and Core Cauliflower ) -
• 2 medium-small leeks, cleaned, halved lengthwise, sliced into 1/4-in thick slices, white and light green parts only, about 2 cups -
• 2 tablespoons butter -
• 2 tablespoons all-purpose flour -
• 1 1/3 cups milk -
• 4 ounces Gruyere cheese, grated -
• 1 teaspoon minced fresh thyme or 1/2 teaspoon dried thyme -
• 1/8 teaspoon grated nutmeg -
• 1 teaspoon salt -
• Black pepper -
• Topping: -
• 1 1/2 cups fresh breadcrumbs (3 slices sandwich or rustic bread, pulsed in a food processor) -
• 1 tablespoon butter -
• 1/4 teaspoon salt -